Blind Watermarking Algorithm Based on Mapping Mechanism for Remote Sensing Image
Zhiwei Wang · Acta Geodaetica et Cartographica Sinica · 2011
A blind watermarking algorithm resistance against the geometric attacks for remote sensing data is presented based on mapping mechanism.First,the pseudo-random binary sequence,which is generated by the random number generator,is used as the watermarking information.Then,the mapping function of the image data and watermark information is established,and the mapping variable is expanded,which can determine the watermark embedding position.Finally,the modified pixel value bit-plane,which is based on mapping mechanism,is used as the watermark embedded rules.Watermark detecting is the inverse process of watermark embedding,and the watermark information is determined by majority rule.The presented method overcomes the limitation that the image size and the pixel relative coordinate remain the same after the traditional attacking.The watermark capacity has been effectively expanded,and the presented method has good robustness,invisibility and maintains the accuracy of features and statistical properties of image.